Dental compound gun

Abstract

Disclosed herein is a dental compound gun. A body unit has a gun shape. A compound material stick is inserted into the body unit through an insert hole formed in the body unit. A feeding unit transfers the compound material stick to an outlet. A melting unit heats the compound material stick and discharges melted compound material out of the body unit. A drive unit includes a trigger and a motor. A control unit controls power to be supplied to the motor. A support unit is coupled to a lower end of the body unit so that the body unit can be placed upright on a support surface. The control unit controls the motor in such a way that when the operation signal of the trigger is generated, the motor is forwardly rotated, and when the operation signal of the trigger is interrupted, the motor is reversely rotated.

What is claimed is: 
     
         1 . A dental compound gun, comprising:
 a body unit having a gun shape, with an insert hole formed in a first end of the body unit so that a compound material stick is inserted into the body unit through the insert hole;   a feeding unit transferring the compound material stick inserted into the insert hole to a second end of the body unit;   a melting unit heating the compound material stick transferred thereinto by the feeding unit, melting the compound material stick, and discharging melted compound material out of the body unit;   a drive unit comprising a trigger for driving the feeding unit, and a motor provided to be operated by operation of the trigger;   a control unit receiving an operation signal of the trigger and controlling power to be supplied to the motor; and   a support unit coupled to a lower end of the body unit, the support unit being supported on a support surface so that the body unit is placed upright on the support surface,   wherein the control unit controls the motor in such a way that when the operation signal of the trigger is generated, the motor is forwardly rotated, and when the operation signal of the trigger is interrupted, the motor is reversely rotated.   
     
     
         2 . The dental compound gun as set forth in  claim 1 , wherein the support unit comprises: a power connector for supplying external power to the control unit; and a thermostat for controlling a heating temperature of the melting unit,
 wherein the control unit controls an rpm of the motor in response to a temperature set by the thermostat, thus controlling a rate at which the compound material stick is transferred.   
     
     
         3 . The dental compound gun as set forth in  claim 1 , wherein the feeding unit comprises:
 a worm shaft connected to an output shaft of the motor so that the worm shaft is rotated by the motor; and   at least one roller connected to the worm shaft by a gear, the roller coming into rolling contact with the compound material stick and rotating to transfer the compound material stick.   
     
     
         4 . The dental compound gun as set forth in  claim 3 , wherein the feeding unit further comprises
 a stick holder guiding insertion of the compound material stick into the melting unit, the stick holder comprising: a tubular body made of elastic rubber; and a tapered surface disposed between the melting unit and the roller, the tapered surface being inclined inwards from an inlet of the stick holder such that an end of the compound material stick is frictionally guided by the tapered surface.   
     
     
         5 . The dental compound gun as set forth in  claim 4 , wherein the feeding unit further comprises
 a wobbling prevention member protruding towards the inlet of the stick holder and supporting an outer circumferential surface of the compound material stick inserted into the stick holder.   
     
     
         6 . The dental compound gun as set forth in  claim 2 , wherein the feeding unit comprises:
 a worm shaft connected to an output shaft of the motor so that the worm shaft is rotated by the motor; and   at least one roller connected to the worm shaft by a gear, the roller coming into rolling contact with the compound material stick and rotating to transfer the compound material stick.   
     
     
         7 . The dental compound gun as set forth in  claim 6 , wherein the feeding unit further comprises
 a stick holder guiding insertion of the compound material stick into the melting unit, the stick holder comprising: a tubular body made of elastic rubber; and a tapered surface disposed between the melting unit and the roller, the tapered surface being inclined inwards from an inlet of the stick holder such that an end of the compound material stick is frictionally guided by the tapered surface.   
     
     
         8 . The dental compound gun as set forth in  claim 7 , wherein the feeding unit further comprises
 a wobbling prevention member protruding towards the inlet of the stick holder and supporting an outer circumferential surface of the compound material stick inserted into the stick holder.